144253521 has 16 divisors (see below), whose sum is σ = 214032000. Its totient is φ = 96023664.

The previous prime is 144253513. The next prime is 144253537. The reversal of 144253521 is 125352441.

It is not a de Polignac number, because 144253521 - 2³ = 144253513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (144253321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15955 + ... + 23303.

It is an arithmetic number, because the mean of its divisors is an integer number (13377000).

Almost surely, 2^144253521 is an apocalyptic number.

It is an amenable number.

144253521 is a deficient number, since it is larger than the sum of its proper divisors (69778479).

144253521 is an equidigital number, since it uses as much as digits as its factorization.

144253521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8085 (or 8079 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 144253521 is about 12010.5587297178. The cubic root of 144253521 is about 524.4556971040.

The spelling of 144253521 in words is "one hundred forty-four million, two hundred fifty-three thousand, five hundred twenty-one".